need help with crossfire settings. ok, i only had this board for a few weeks now and i still can't figure out the pin settings to enable crossfire. i'm trying to crossfire an asus 3870x2 with a sapphire 3870. now i'm reading the manual and it's not very clear. i left the connectors at default right now and i'm not sure if that's crossfire enabled or not. anyone running crossfire on this board can help me out please. thank you very much.